Finding the Fourth Proportional to 1,330.15, 1,835.72 and 1,015.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,330.15 : 1,835.72 = 1,015.87 : x
2. Step 2: Convert to fraction form
   1,330.15/1,835.72 = 1,015.87/x
3. Step 3: Cross multiply
   1,330.15x = 1,835.72 × 1,015.87
4. Step 4: Simplify right side
   1,330.15x = 1,864,852.88
5. Step 5: Solve for x
   x = 1,864,852.88/1,330.15
6. Step 6: Final answer
   x = 1,401.99